P6 - Molecules and Matter

Question 1

formula density

Answer 1

density = mass / volume
D = M / V

Question 2

formula specific latent heat

SLH

Answer 2

specific latent heat = energy / mass
SLH = E / m

Question 3

State change names:
1. solid → gas
2. gas → solid

Answer 3

1. sublimation
2. deposition

Question 4

State change names:
1. solid → liquid
2. liquid→ solid

Answer 4

1. melting
2. freezing

Question 5

State change names:
1. liquid → gas
2. gas → liquid

Answer 5

1. evaporation
2. condensation

Question 6

define latent heat

Answer 6

The total energy absorbed or emitted by a substance while it changes state.

Question 7

name the 2 types of latent heat

Answer 7

• latent heat of fusion
• latent heat of vapourization

Question 8

define latent heat of fusion

Answer 8

The total energy required to change a substance from a solid to a liquid.

Question 9

define latent heat of vapourization

Answer 9

The total energy required to change a substance from a liquid to a gas.

Question 10

define specific latent heat

Answer 10

The energy transferred to 1 kg of a substance to change its state.

Question 11

How do particles move in a fluid?

Answer 11

Particles move with a random motion.

brownian motion

Question 12

formula Boyle’s law

Answer 12

pressure * volume = constant

Question 13

what does Boyle’s law show

Answer 13

Boyle’s Law states that for a gas at a constant temperature, pressure × volume is also constant. So, increasing pressure means that volume will decrease providing that the temperature remains constant.